CA2477773C - A stable diclofenac-tromethamine composition for the topical treatment of oropharyngeal cavity disorders - Google Patents

A stable diclofenac-tromethamine composition for the topical treatment of oropharyngeal cavity disorders Download PDF

Info

Publication number
CA2477773C
CA2477773C CA2477773A CA2477773A CA2477773C CA 2477773 C CA2477773 C CA 2477773C CA 2477773 A CA2477773 A CA 2477773A CA 2477773 A CA2477773 A CA 2477773A CA 2477773 C CA2477773 C CA 2477773C
Authority
CA
Canada
Prior art keywords
diclofenac
composition according
salt
tromethamine
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA2477773A
Other languages
French (fr)
Other versions
CA2477773A1 (en
Inventor
Mario Pinza
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angelini Acraf SpA
Original Assignee
Aziende Chimiche Riunite Angelini Francesco ACRAF SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aziende Chimiche Riunite Angelini Francesco ACRAF SpA filed Critical Aziende Chimiche Riunite Angelini Francesco ACRAF SpA
Publication of CA2477773A1 publication Critical patent/CA2477773A1/en
Application granted granted Critical
Publication of CA2477773C publication Critical patent/CA2477773C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/185Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19Carboxylic acids, e.g. valproic acid
    • A61K31/195Carboxylic acids, e.g. valproic acid having an amino group
    • A61K31/196Carboxylic acids, e.g. valproic acid having an amino group the amino group being directly attached to a ring, e.g. anthranilic acid, mefenamic acid, diclofenac, chlorambucil
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/0012Galenical forms characterised by the site of application
    • A61K9/0053Mouth and digestive tract, i.e. intraoral and peroral administration
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/185Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19Carboxylic acids, e.g. valproic acid
    • A61K31/195Carboxylic acids, e.g. valproic acid having an amino group
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/02Stomatological preparations, e.g. drugs for caries, aphtae, periodontitis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00Drugs for disorders of the respiratory system
    • A61P11/02Nasal agents, e.g. decongestants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/02Local antiseptics

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Epidemiology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Nutrition Science (AREA)
  • Physiology (AREA)
  • Rheumatology (AREA)
  • Otolaryngology (AREA)
  • Oncology (AREA)
  • Pulmonology (AREA)
  • Communicable Diseases (AREA)
  • Pain & Pain Management (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Medicinal Preparation (AREA)
  • Cosmetics (AREA)

Abstract

A composition for the topical treatment of oropharyngeal cavity disorders, comprising an aqueous solution of the salt of diclofenac with tromethamine, in which the amount of the said salt is of from 0.1% to 0.2% (w/w) and the pH is adjusted between 7 and 8.

Description

"Diclofenac-based composition for the topical treatment of oropharyngeal cavity disorders"
**********
The present invention relates to a diclofenac-based composition for the topical treatment of oropharyngeal cavity disorders.
It is known that diclofenac [2-(2,6-dichloroanilino)phenylacetic acid] is a widely-used pharmaceutical product with anti-inflammatory, antipyretic and analgesic properties. It is mainly administered systemically in unmodified form or in the form of a salt thereof with mineral or organic bases.
However, its salts are virtually insoluble in water.
Example 2 of patent US-4 407 824 describes the preparation of the salt of diclofenac with tromethamine [tris(hydroxymethyl)methylamine], but does not specify its solubility in water and does not give an example of any pharmaceutical form containing the abovementioned salt.
The problem of the insolubility in water of diclofenac salts is also acknowledged in EP-A-0 521 393, which proposes to solve the said problem by means of the choline salt. This salt is described as a compound that is surprisingly soluble in water and suitable, inter alia, also for the preparation of mouthwashes.
However, the choline salt has the typical drawbacks of choline, which is well known for its unpleasant odour and taste.
These drawbacks are particularly unfavourable in the case of compositions for the topical treatment of oropharyngeal cavity disorders, for instance mouthwashes and oral sprays, which need to remain in contact with the mucosae for a relatively long period of time in order to exert their therapeutic effect.
Despite the addition of large amounts of ingredients capable of masking its taste [0.5% (w/w) of acesulfame and 35% (w/w) of sorbitolJ, compositions for the topical treatment of oropharyngeal cavity disorders based on the salt of diclofenac with choline are relatively unpalatable.
There is therefore still a great need for a diclofenac-based composition of pleasant or at the very least neutral taste, for the topical treatment of oropharyngeal cavity disorders.
Although A. Fini et al. have reported that the solubility in water of the tromethamine salt is considered to be 0.167 g in 100 ml (European J.
Pharm. Sci. 4, 231, 1996), the tests conducted by the present inventor have demonstrated that amounts of diclofenac ranging from 0.071 to 0.142 g do not dissolve in 100 ml of water even in the presence of stoichiometric amounts (from 0.029 to 0.058 g, respectively) of tromethamine (Comparative Examples 1 and 2).
Surprisingly, it has now been found that the abovementioned compositions containing from 0.071 to 0.142 g of diclofenac with stoichiometric amounts (from 0.029 to 0.058 g, respectively) of tromethamine in 100 ml of water become clear and remain so for a long time if their pH is brought to 7-8 (Examples 1 and 2).
Also surprisingly, it has been found that the palatability of these solutions is good and that it is also very easy to improve it by means of modest amounts of standard flavouring agents and sweeteners.
One subject of the present invention is thus a composition for the topical treatment of oropharyngeal cavity disorders, characterized in that it comprises an aqueous solution of the salt of diclofenac with tromethamine, in which the amount of the said salt is of from 0.1 % to 0.2% (w/w) and the pH is adjusted between 7 and 8.
The preferred concentration of the salt of diclofenac with tromethamine in the composition of the present invention is 0.1 % (w/w).
Advantageously, the abovementioned mouthwash comprises other standard ingredients, for instance ethanol, polyhydroxylated alcohols, complexing agents, preserving agents, humectants, sweeteners, flavouring agents, colouring agents and the like.
Typical examples of these ingredients are:
polyhydroxylated alcohols: glycerol, propylene glycol and polyethylene glycol;
complexing agents: sodium edetate;
preserving agents: methyl p-hydroxybenzoate and propyl p-hydroxybenzoate, sodium benzoate;
humectants: glyceryl polyethylene glycol ricinoleate;
sweeteners: sodium saccharinate, sorbitol, acesulfame and xylitol;
gelling agents: block copolymers of polyethylene glycol and polypropylene glycol such as, for example, PoloxamerT"" 407;
flavouring agents: mint flavouring agent, natural tutti frutti flavouring agent and grenadine flavouring agent;
colouring agents: quinoline yellow E 104 and patent blue E 131.
Typical examples of oropharyngeal cavity disorders which benefit from treatment with the composition of the present invention are:
gingivitis, glossitis, stomatitis, aphthae, paradentosis, paradentitis, laryngitis, pharyngitis and mucositis caused by radiotherapy and chemotherapy. In addition, the composition of the invention is useful in the treatment of after-effects of dental and/or general surgery.
Preferred dosage forms of the composition of the present invention are mouthwashes and oral sprays.
These dosage forms can be readily prepared according to techniques known to pharmaceutical chemists, and include stages such as mixing, dissolution, sterilization and the like.
The following examples serve to illustrate the invention without, however, limiting it.
Example 1 Mouthwash A
100 g of Mouthwash A contains:
salt of diclofenac with tromethamine~ 0.104 g xylitol 10.000 g PoloxamerT"" 407 0.500 g sodium benzoate 0.500 g natural mint flavouring agent 0.500 ml aqueous solution of E 131 (1 mg/ml) 0.200 ml pH 7.8 phosphate buffer~~ qs 100 g pH 7.6 1 equal to 0.074 g of acidic diclofenac ..
one litre of solution in purified water contains: anhydrous dibasic sodium phosphate (5.803 g), anhydrous monobasic potassium phosphate (3.522 g) and 1 N sodium hydroxide (18.70 ml).
Example 2 Mouthwash B
100 g of Mouthwash B have the same composition as Mouthwash A
except that:
- it also contains natural tutti frutti flavouring agent (0.04 ml) and natural grenadine flavouring agent (0.02 ml), and - in place of 0.2 ml of aqueous solution of E 131 (1 mg/ml), it contains 0.25 ml of aqueous solution of E 124 (10 mg/ml).
Comparative Example 1 Mouthwash C
A mouthwash was prepared having the same composition as Mouthwash A, except that it contained purified water in place of the pH
7.8 phosphate buffer.
Comparative Example 2 Mouthwash D
A mouthwash was prepared having the same composition as Mouthwash B, except that it contained purified water in place of the pH 7.8 phosphate buffer.
Stability Mouthwashes A and B were found to be stable.
In contrast, Mouthwashes C and D released over time, especially under cold conditions, a precipitate of diclofenac.
This behaviour was entirely unexpected as regards the mouthwashes containing an amount of salt of diclofenac with tromethamine that is less than the solubility limit reported by Fini et al. (cited above).

Claims (8)

1. Composition for the topical treatment of oropharyngeal cavity disorders, characterized in that it comprises an aqueous solution of the salt of diclofenac with tromethamine, in which the amount of the said salt is of from 0.1 % to 0.2% (w/w) and the pH is adjusted between 7 and 8.
2. Composition according to Claim 1, characterized in that it contains 0.10% (w/w) of the salt of diclofenac with tromethamine.
3. Composition according to Claim 1 or 2, characterized in that it further comprises a sweetener selected from the group comprising sodium saccharinate, sorbitol, acesulfame and xylitol.
4. Composition according to any one of the preceding Claims 1 to 3, characterized in that it further comprises a preserving agent selected from the group comprising sodium benzoate, methyl p-hydroxybenzoate and propyl p-hydroxybenzoate.
5. Composition according to any one of the preceding Claims 1 to 4, characterized in that it further comprises a gelling agent consisting of a block copolymer of polyethylene glycol and polypropylene glycol.
6. Composition according to any one of the preceding Claims 1 to 5, characterized in that it further comprises a pharmaceutically acceptable flavouring agent.
7. Composition according to any one of the preceding Claims 1 to 6, characterized in that it further comprises a pharmaceutically acceptable colouring agent.
8. Composition according to any one of the preceding Claims 1 to 7, characterized in that it is used in the treatment of gingivitis, glossitis, stomatitis, aphthae, paradentosis, paradentitis, laryngitis, pharyngitis, mucositis of the oral cavity caused by radiotherapy and chemotherapy, and of after-effects of dental and/or general surgery.
CA2477773A 2002-05-10 2003-04-16 A stable diclofenac-tromethamine composition for the topical treatment of oropharyngeal cavity disorders Expired - Fee Related CA2477773C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI2002A000986 2002-05-10
IT2002MI000986A ITMI20020986A1 (en) 2002-05-10 2002-05-10 COMPOSITION BASED ON DICLOFENAC FOR THE TOPICAL TREATMENT OF AFFECTIONS OF THE OROPHARINGOUS CABLE
PCT/EP2003/004044 WO2003094905A1 (en) 2002-05-10 2003-04-16 Diclofenac-based composition for the topical treatment of oropharyngeal cavity disorders

Publications (2)

Publication Number Publication Date
CA2477773A1 CA2477773A1 (en) 2003-11-20
CA2477773C true CA2477773C (en) 2011-01-18

Family

ID=11449862

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2477773A Expired - Fee Related CA2477773C (en) 2002-05-10 2003-04-16 A stable diclofenac-tromethamine composition for the topical treatment of oropharyngeal cavity disorders

Country Status (22)

Country Link
US (1) US20050100597A1 (en)
EP (1) EP1503747B1 (en)
JP (1) JP2005526120A (en)
KR (1) KR20040111415A (en)
CN (1) CN1303992C (en)
AR (1) AR039977A1 (en)
AT (1) ATE333872T1 (en)
AU (1) AU2003232480B2 (en)
CA (1) CA2477773C (en)
DE (1) DE60307086T2 (en)
DK (1) DK1503747T3 (en)
EA (1) EA006165B1 (en)
ES (1) ES2268402T3 (en)
GE (1) GEP20063822B (en)
HK (1) HK1071312A1 (en)
IL (2) IL163871A0 (en)
IT (1) ITMI20020986A1 (en)
MX (1) MXPA04010401A (en)
PL (1) PL215221B1 (en)
PT (1) PT1503747E (en)
UA (1) UA79110C2 (en)
WO (1) WO2003094905A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20032523A1 (en) * 2003-12-19 2005-06-20 Acraf DOSAGE FORM FOR ORAL USE INCLUDING A DRUG
ITMI20040235A1 (en) * 2004-02-13 2004-05-13 Therapicon Srl PHARMACEUTICAL PREPARATION FOR THE ORAL CABLE
CN101138544B (en) * 2006-09-06 2010-09-29 上海医药工业研究院 Diclofenac or the salt partial film forming gel composition and uses thereof
AU2007311019B2 (en) 2006-10-17 2013-05-16 Nuvo Pharmaceuticals, Inc Diclofenac gel
US8546450B1 (en) 2009-03-31 2013-10-01 Nuvo Research Inc. Treatment of pain with topical diclofenac compounds
US8618164B2 (en) 2009-03-31 2013-12-31 Nuvo Research Inc. Treatment of pain with topical diclofenac compounds
US20120003162A1 (en) * 2010-06-30 2012-01-05 Mcneil-Ppc, Inc. Methods of Preparing Non-Alcohol Bioactive Esential Oil Mouth Rinses
KR101936192B1 (en) 2010-12-29 2019-01-08 엘지전자 주식회사 Outdoor unit for air conditioner
DE102011111944A1 (en) * 2011-08-29 2013-02-28 Richard A. Huthmacher Use of diclofenac for the prevention and treatment of influenza infections as well as disease symptoms caused by influenza infections
JP2017526638A (en) * 2014-06-30 2017-09-14 ミトコンドリアル サブストレート インベンション リミテッドMitochondrial Substrate Invention Limited Nutrient solutions for improving cognitive function
CN104546527A (en) * 2014-12-29 2015-04-29 福建省闽东力捷迅药业有限公司 Collutory containing sodium aescinate and preparation method of collutory

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT370721B (en) * 1981-02-24 1983-04-25 Ciba Geigy Ag METHOD FOR PRODUCING NEW SALTS OF 2- (2,6-DICHLORANILINO) -PHENYLACETIC ACID, THE
ES2054089T3 (en) * 1988-11-10 1994-08-01 Ciba Geigy Ag LIQUID ORAL FORMULATIONS.
CA1340994C (en) * 1989-09-21 2000-05-16 Rudolf Edgar Dr. Falk Treatment of conditions and disease
US5028413A (en) * 1990-03-21 1991-07-02 Bausch & Lomb Incorporated Novel fluoride-containing dentifrice
IT1243342B (en) * 1990-07-13 1994-06-10 Farcon Ag ORAL PHARMACEUTICAL COMPOSITIONS FOR LIQUID ANTI-INFLAMMATORY ACTIVITIES
US5972906A (en) * 1991-07-03 1999-10-26 Hyal Pharmaceutical Corporation Treatment of mucous membrane disease, trauma or condition and for the relief of pain thereof
IT1250636B (en) * 1991-07-04 1995-04-21 Ricerche Di Schiena Del Dr Mic SALT OF DICLOFENAC, METHOD OF PREPARATION AND PHARMACEUTICAL COMPOSITIONS THAT CONTAIN IT.
US5626838A (en) * 1995-03-13 1997-05-06 The Procter & Gamble Company Use of ketorolac for treatment of squamous cell carcinomas of the oral cavity or oropharynx
CN1059797C (en) * 1995-11-22 2000-12-27 王树力 Spray containing diclofenac sodium

Also Published As

Publication number Publication date
WO2003094905A8 (en) 2004-04-01
MXPA04010401A (en) 2005-02-17
CN1652763A (en) 2005-08-10
IL163871A (en) 2007-10-31
ITMI20020986A0 (en) 2002-05-10
CN1303992C (en) 2007-03-14
AU2003232480B2 (en) 2008-07-31
PT1503747E (en) 2006-11-30
AU2003232480A1 (en) 2003-11-11
DE60307086D1 (en) 2006-09-07
KR20040111415A (en) 2004-12-31
JP2005526120A (en) 2005-09-02
EA006165B1 (en) 2005-10-27
EA200401090A1 (en) 2005-02-24
PL215221B1 (en) 2013-11-29
US20050100597A1 (en) 2005-05-12
ITMI20020986A1 (en) 2003-11-10
DK1503747T3 (en) 2006-11-27
CA2477773A1 (en) 2003-11-20
GEP20063822B (en) 2006-05-10
IL163871A0 (en) 2005-12-18
PL371426A1 (en) 2005-06-13
ATE333872T1 (en) 2006-08-15
WO2003094905A1 (en) 2003-11-20
DE60307086T2 (en) 2007-02-01
UA79110C2 (en) 2007-05-25
AR039977A1 (en) 2005-03-09
EP1503747B1 (en) 2006-07-26
ES2268402T3 (en) 2007-03-16
HK1071312A1 (en) 2005-07-15
EP1503747A1 (en) 2005-02-09

Similar Documents

Publication Publication Date Title
CA1234050A (en) Injectable solution for the treatment of inflammations
US6365131B1 (en) Pharmaceutical dental formulation for topical application of metronidazole benzoate, chlorhexidine gluconate and local anesthetic
US5028625A (en) Acid addition salt of ibuprofen and meglumine
US4446140A (en) Method and composition for treating mouth pain
CA2477773C (en) A stable diclofenac-tromethamine composition for the topical treatment of oropharyngeal cavity disorders
US5100898A (en) Antitussive liquid compositions containing dyclonine
US4892877A (en) Antitussive liquid compositions containing phenol
HUT67672A (en) Sparfloxacine solution and process for producing that
US20070154497A1 (en) Stable, palatable syrup containing ibuprofen and method of its preparation
CA2077693C (en) Use of ketorolac for treatment of periodontal disease
JPH05221857A (en) Compounded antipyretic analgesic agent
JPH10298045A (en) Composition for oral cavity
JP2000515556A (en) Drugs for oral administration containing Nimelide
US20040132815A1 (en) Preventive/remedial agent for inflammatory disease in oral-cavity mucosa and the like
EP1413292A1 (en) Bioadhesive pharmaceutical compositions based on non-steroidal anti-inflammatory drugs
JP3027696B2 (en) Stable aqueous pharmaceutical composition
GR1009069B (en) Drinkable pharmaceutical high-concentration solutions containing hydrochloric ranitidine
JP2000256186A (en) Composition for pharyngeal disease
IE49218B1 (en) Methyldopa composition

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20190416